package com.hy.interceptor;

import cn.hutool.json.JSONUtil;
import com.hy.constans.HttpStatus;
import com.hy.domain.dto.R;
import com.hy.util.UserHolder;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        // 1.判断是否需要拦截（ThreadLocal中是否有用户）
        System.out.println("UserHolder.getUser() = " + UserHolder.getUser());
        if (UserHolder.getUser() == null) {
            // 没有，需要拦截，设置状态码
            response.setContentType("text/json; charset=utf8");
            response.setCharacterEncoding("utf-8");
            response.setStatus(401);
            response.getWriter().print(JSONUtil.toJsonStr(R.fail(HttpStatus.UNAUTHORIZED, "认证失败")));
            // 拦截
            return false;
        }
        // 有用户，则放行
        return true;
    }
}
